statistically representative sample
[/stətɪˈstɪkəli ˌrɛprɪˈzɛntətɪv ˈsæmpəl/]
nounpl: statistically representative samples
amostra estatisticamente representativa
1. A subset of a population selected in such a way that its characteristics accurately reflect those of the larger population, allowing for valid statistical inferences
The survey used a statistically representative sample of 2,000 voters from across all demographic groups.
A pesquisa utilizou uma amostra estatisticamente representativa de 2.000 eleitores de todos os grupos demográficos.
2. A sample that has been selected through appropriate statistical methods to ensure it mirrors the population's key variables and distributions
To ensure accuracy, the researchers collected a statistically representative sample before conducting their analysis.
Para garantir a precisão, os pesquisadores coletaram uma amostra estatisticamente representativa antes de conduzir sua análise.
This is a technical term widely used in Brazilian and Portuguese academic research, market studies, and survey methodology. In Brazil, it is essential in IBGE (Brazilian Institute of Geography and Statistics) publications and market research reports. The concept is fundamental to credible research and polling in both Brazil and the USA, where statistical validity is a legal and ethical requirement for published studies.
Related Idioms & Phrases
a true cross-section of the population
mirror the population accurately
reflect the diversity of the larger group
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